BMW Cooling System Parts & Accessories for BMW 3 Series G20 (2019+)

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The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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Coolant Return Line
Coolant Return Line
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Rein - Corporate Logo
T#:53856300
Part#: 11538650087
In Stock
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$ 60.99 USD
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$ 60.99 USD
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Rein Automotive turbo hoses are engineered to meet these rigorous demands, providing the reliability required for both the track and the street.
URO Coolant Expansion Tank Cap - G2x G4x G6x G7x
URO Coolant Expansion Tank Cap - G2x G4x G6x G7x
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URO - Corporate Logo
T#:56760937
Part#: 17138665638
Ships in 2 Business Days
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$ 25.99 USD
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$ 25.99 USD
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A compromised expansion tank cap can lead to loss of pressure, fluid leaks, and dangerous engine overheating. This URO Coolant Reservoir Cap provides a dependable, cost effective solution to restore factory pressure thresholds on modern G-Chassis BMW models.
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CSF Universal Large Single-Pass Oil Cooler - Universal Application
CSF Universal Large Single-Pass Oil Cooler - Universal Application ...
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Universal fitment design - modifications may be necessary to run this cooler
CSF - Corporate Logo
T#:53608839
Part#: 8371
Ships in 4 Business Days
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$ 499.00 USD
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$ 499.00 USD
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CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.
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Rein Turbocharger Coolant Supply Line - BMW B58 Gen2
Rein Turbocharger Coolant Supply Line - BMW B58 Gen2
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Rein - Corporate Logo
T#:58307569
Part#: 11538650086
Ships in 4 Business Days
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$ 72.00 USD
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$ 72.00 USD
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Supplies coolant to the turbocharger
Rein Expansion Tank Coolant Hose - G20 G22 G23 G26 G42 (B46 B48)
Rein Expansion Tank Coolant Hose - G20 G22 G23 G26 G42 (B46 B48) ...
For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later...
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Rein - Corporate Logo
T#:58307536
Part#: 17128654824
Ships in 4 Business Days
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$ 26.99 USD
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$ 26.99 USD
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Prevent catastrophic cooling system failure and maintain optimal system pressure with a Rein Expansion Tank Vent Line. Engineered as a direct fit replacement for brittle factory expansion tank lines, this vent hose routes pressurized coolant vapor from the cylinder head back to the expansion reservoir. Manufactured with durable heat resistant materials and factory style quick disconnect fittings, it ensures a tight seal against pressure drops and prevents fluid loss.
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Upper Radiator Coolant Hose
Upper Radiator Coolant Hose
For models with a production date up to 07/2021 or a production date from 07/2021+ with...
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Rein - Corporate Logo
T#:58489958
Part#: 17128654834
Ships in 4 Business Days
New Item
$ 65.99 USD
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$ 65.99 USD
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Protect your engine against severe heat soak and maintain precise cooling system pressure with a Rein Upper Radiator Hose. Engineered as a direct fit replacement for degradation prone original equipment hoses, this upper radiator line transfers high temperature coolant straight to the main radiator. Manufactured with high grade heat resistant EPDM rubber and OEM style quick connect fittings, it provides exceptional resistance to internal pressure spikes, ozone degradation, and chemical breakdown under demanding driving conditions.
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Vargas Remote Oil Cooler Adapter - BMW B58, Toyota A90/A91
Vargas Remote Oil Cooler Adapter - BMW B58, Toyota A90/A91
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Vargas Turbo Technologies - Corporate Logo
T#:51778122
Part#: VTT-B58-OIL-COOL
Ships on Oct 13, 2026
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$ 157.99 USD
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$ 157.99 USD
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The VTT Billet B58 Remote Oil Cooler Adapter is an ideal upgrade for B58-powered platforms.
Vargas Billet HMM Delete Kit - BMW B58TU
Vargas Billet HMM Delete Kit - BMW B58TU
Fits all B58 TU / Gen 2 B58 engines
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Vargas Turbo Technologies - Corporate Logo
T#:51672725
Part#: VTT-B58-COOLING-
Ships on Oct 13, 2026
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$ 199.99 USD
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The VTT Billet B58 HMM Delete is for enthusiasts who want to remove the bulky, plastic factory coolant unit in favor of a robust, motorsport-oriented setup.
Vargas Billet Coolant Block-Off - BMW B58 Engine
Vargas Billet Coolant Block-Off - BMW B58 Engine
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Vargas Turbo Technologies - Corporate Logo
T#:52094566
Part#: VTTFAB040BLKB58
Ships on Oct 13, 2026
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$ 31.99 USD
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$ 31.99 USD
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Engineered for precision and durability, the VTT-FAB-040 B58 Block-Off Flange is the definitive solution for managing oil and coolant paths during fabrication.
VEMO Electronic Thermostat And Coolant Distribution Module - BMW B58TU (B58D vs B58C)
VEMO Electronic Thermostat And Coolant Distribution Module - BMW B58T...
For vehicles with the early B58C or B58D TU engine - Will not fit the B58N TU2 engine
Vemo - Corporate Logo
T#:52903296
Part#: V20-99-0005
Ships on Oct 15, 2026
New Item
$ 336.99

This product was last offered at the strikethrough price on
08-05-2026

$ 295.99 USD
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$ 295.99 USD
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An electronic thermostat that is controlled by the car's computer for optimal control over the engine and coolant temperature. Internal valves are opened and closed by the vehicle's DME/ECU to achieve specific temperature targets for optimal engine efficiency and performance.
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